Aviation's biggest challenge is it's an easy target, having embraced a position of guilt and vain attempts to buy lenience by way of opaque carbon off-set plans.
What this industry really needs, is for someone to go on the offensive and direct the public attention towards far larger polluter in the transport industry, and here I'm thinking of the global fleet of cargo carrying vessels burning heavy bunker oil. The container fleet of the largest such carrier, Maersk Line, emits more pollution than the total of all private cars in the world. Try to let that sink in for a minute, and realise that's also more than the combined emissions of the global airline industry.
Without being an engineer, let alone of the naval persuasion, it does not seem beyond the realm of possibility, that large cargo carrying vessels ditch their diesels in favour of electric propulsion driven by a bank of batteries in the bottom of the vessels, charged by natural gas driven lean turbines and a large solar array fitted on the top deck.